_____ the police thought he was the most likely one, they could not arrest him since they had no exact proof about it.
A. Although B. As long as C. If only D. As soon as
The wild flowers looked like a soft orange blanket _____ the desert.
A. to cover B. covered C. cover D. covering
My parents have promised to come to see me before I _____ for Africa.
A. have left B. leave C. left D. will leave
It was the principles I learned from my reading _____ enabled me to get bigger and better jobs.
A. that B. which C. what D. who
How much _____ she looked without her glasses!
A. well B. good C. best D. better
---It’s the office! So you _____ know eating is not allowed here.
---Oh, sorry.
A. may B. will C. must D. need
